Scheme 1.
Conditions: (a): (i) NaOC2H5, DMSO, 145–150 °C, 72h. (ii) 0.3M HCl (b): (i) THF, DMF, 150 °C, 48–72h.
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.